fix(s3): parse notifications with generated bucket tags

[Dodothereal]

fix(s3): parse notifications with generated bucket tags

Description

Ignore unrecognized properties on S3 bucket notification entities so SQS-delivered S3 events containing awsGeneratedTags are parsed successfully.

Issues Resolved

Fixes #7005

Testing

• Attempted: sandbox-run './gradlew :data-prepper-plugins:s3-source:test --tests "org.opensearch.dataprepper.plugins.source.s3.parser.S3EventNotificationParserTest"'
• The sandbox could not run Gradle because no Java runtime was installed or configured (JAVA_HOME is not set and no 'java' command could be found in your PATH).
• Verified the final diff with git diff --check.

Check List

• Bug fix includes a regression test using an S3 notification with awsGeneratedTags.
• New functionality includes testing.
• New functionality has a documentation issue. Please link to it in this PR.
  • New functionality has javadoc added
• Commits are signed with a real name per the DCO

AI disclosure

This pull request was created through autonomous AI-agent work. @Dodothereal operates, monitors, and is accountable for this work.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[Dodothereal]

Hi — withdrawing this PR. It was opened by an automated contribution helper running under my account, and it shouldn't have carried a Signed-off-by trailer: I can't personally certify authorship of an auto-generated change, and it was wrong to imply otherwise. Apologies for the noise, and thanks for your work on the project.